A219067 Hilltop maps: number of 6 X n binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..2 6 X n array.

1, 3697, 256849, 16520553, 1054361217, 67441480753, 4315297469409, 276118155837273, 17667523952980289, 1130460774142233681, 72332806348866425545, 4628232467782206332137, 296138599053919461336353

Offset

1,2

Comments

Row 6 of A219063.

Links

R. H. Hardin, Table of n, a(n) for n = 1..32

Example

Some solutions for n=3
..0..1..0....0..0..1....0..0..1....0..1..0....0..0..1....0..0..1....0..0..0
..1..1..0....0..0..1....0..1..0....0..0..1....1..0..0....1..1..1....1..0..0
..0..0..1....1..0..0....0..0..1....0..0..0....0..1..1....0..0..0....1..0..1
..0..0..1....1..1..1....0..0..1....1..1..0....1..0..0....0..1..0....1..1..1
..0..1..1....1..1..1....0..1..0....1..0..0....1..1..1....0..0..1....1..1..1
..1..1..1....0..1..1....1..0..1....1..0..0....1..1..0....1..0..0....0..1..0

Crossrefs

Cf. A219063.

Sequence in context: A186198 A188155 A061660 * A035780 A108004 A176386

Adjacent sequences: A219064 A219065 A219066 * A219068 A219069 A219070

Keyword

nonn

Author

R. H. Hardin, Nov 11 2012

Status

approved